Separable tooth for power-shovel dippers.



UNITED .STATESPATENT our iron.-

ANDREW Ol ANDERSON ANT) ANDREW JOHNSON; OF ST. PAUL, MINNESOTA,ASSIGNORS QF ONE-HALF TO RUDOLPH MATAK AND WILLIAM MATAK, OF ST. PAUL,MINNESOTA.

SEPARAIBLE TOOTH FOR PQWEBk SHOVEL DIPPERS.

Specification of Letters Patent.

Patented July as; 190s.

Application filed February 24, 1908. Serial No. 1.17324.

' county of Ramsey and State of Minnesota,

have invented certain new-and useful 1mrovements in separable Teeth forPowerhovel Dippers, of which the following is a specification. I

Our invention relates to im rovements in separable tooth for power sovel dip ers,

' and has for its object to rovide a tooth aving a removable point ttedand secured to the shank portion of the tooth in such way as to resistlateral and other strains and not be loosened or broken off thereby.

To that end the invention consists in the construction, combination andarrangement of arts hereinafter described and claimed.

11 the accompanying drawings forming part of'this specification Figure 1is a side viewof a lipper tooth embodyin our improved construction, afragment of the di per being shown partly in section and part y melevation; Fig. 2 is a top view of the tooth alone; Fig. 3 is a crosssection on line 00-00 of Fig. 1; Fig. 4 is across section on line y y ofFig' 1; Fig. 5 is a horizontal section through a fragment of the toothon line 2-2 of Fig. 1, and Fig. 6 is a perspective view of the twomembers of the dipper tooth slightly separated from each other.

As shown in the drawings the dipper tooth comprises a shank member A anda point member B.. The shank member is formed with a comparatively longupper shank 2 and a shorter lower shank 3, between which.

is a slot 4 to receive and embrace the bottom or cutting edge 5 of apower shovel dipper C. The tooth is secured to the dipper by means ofbolts 6 passing through the shanks and the bottom of the dipper, asshown in Fig. 1.

The forward end of the shank member projects beyond the cutti g edge ofthe dipper, and is formed on one side with a forwardly projecting-nose7, which has forwardly convergent upper and lowervfaces 8 and 9, andfits snugly within a similarly sha ed socket 10 in the correspondingside of t e point member B. Likewise the point member is formed on itsother side with a rearwardly projecting nose 11 having convergent upperand lower faces 12 and 13 adapted to fit within a similarly shapedsocket in the corresponding side of the shank portion of the tooth. Thesocket extends rearwardly into the shank ortion, but terminates short ofthe slot 4. hus the meeting! ends of the shank and point members wildovetail into each other, and the overlapping portions thereof willprovide lateral as well as top and bottom support for each other. Theyare fastened toget or by means of one or more pins or bolts 14 passinglaterally through the overlapping nose portions, and

preferably tapered, as shown in Fig.- 5, so as to draw and bind'themembers tightly together from front to rear. They are held togetherlaterally-by means of a nut 15 upon the end of the pin.

At the base of the nose each member is preferably formed with top andbottom shoulders 16 which serve as abutments for the blunt outer ends 17of the cooperating socket in the other member.

Further to strengthen the joint and to brace the overlapping portions ofthe tooth members u on each other against lateral strains and knocks,the top and bottom faces of each nose are beveled or cut away toward theoutsideso that the nose is reduced in height or thickness towards itsouter side,

and the ends of the noses are similarly beveled or cut away toward theoutside, the upper andlower faces. and the ends of the socket wallsbeingoppositely or inwardly beveled so that the noses will be dovetailedor rabbeted into the sockets and the beveled faces will receive and takeup part ofthe lateral thrust. With the same ob'ect in view, namely tobrace the mem ers laterally beveled or. cut away toward the outside, and

the outer ends 17 of the to and bottom walls,

of the sockets are opposite y beveled in order to form a close jointwith the shoulders.

against each other, the shoulders 16 are also It will be seen that theconstruction dewardly projectin nose, and the point mem ber being formeon the corresponding side with a socket adapted to receive said nose,said point member being also formed on its other side with a rearwardlyprojecting nose,

and the shank member being formed on the corresponding side with asocket shaped to receive the nose of the oint member, the upper andlower faces 0 the noses being cut away toward the outside, and the upperand lower faces of the sockets being cut away toward the inside, wherebythe noses are dovetailed into the sockets.

3. A dipper tooth for power shovels comprising two separable members, ashank member adapted to be secured to a power shovel dipper and a pointmember, the point member and shank member being formed at their opposingends with overla ping noses formed on opposite sides of theirongitudinal axes, each member being also formed on the other side of itslongitudinal axis with a socket adapted to receive snugly the nose ofthe other member, the outer end of each nose being cutaway toward theoutside, and the of the cut away, and fastening means passing laterallythrough the overlapping end portions.

4, A dipper tooth comprising two separable members, a shank memberadapted to be secured to a dipper and a removable point member, saidmembers being provided with overla ping noses arrangedon opposite sidesongitudinal axis of the tooth, and being also formed with socketsadapted to receive said noses, and a pin passing removably through saidoverlapplng portions.

5. he combination, with a ower shovel dipper, of a separable tooth terefor comprising a shank member adapted to be secured to the dipper andaremovable'point member, the point member and tooth member being formedon opposite sides of the-1ongitudinal axis of the tooth with aprojecting nose, and each of said members being formed on the other sidewith a socket to receive the nose of the opposing member, each memberbein formed at the base of the nose with top and bottom shoulderscutaway toward the outside, and the outer ends of the sockets being cutaway toward the inside to fit against the shoulders, and means passinglaterally through the overlapping ends of the mem bers for securing thesame together.

In testimony whereof we affix our signatures in presence of twowitnesses.

7 ANDREW O. ANDER SON.

ANDREW JOHNSON.

